“The oceans are providing a service to mankind by actually actively storing the carbon dioxide in the ocean itself,” Professor Bindoff said.

“Now one of the concerns is that as we warm the planet the surface waters will tend to warm preferentially and will tend to become light compared to the water’s depth”

“The consequence of this is that it makes it harder for the oceans to take up carbon dioxide as efficiently as it has done in the past. What this means is the capacity of the ocean to take up the carbon dioxide will reduce into the future.”

While Bindoff says he cannot see a point when the oceans would stop absorbing CO2 entirely, the growing inability of the oceans to absorb as much carbon as they currently do will have adverse effects.

Those gases will remain in the atmosphere, further warming the planet.

“If you look into models of the earth’s system – oceans and atmosphere together – they all project that the efficiency of the carbon uptake by the oceans will decline as we go into the future,” he said. “So the fraction, which sits at roughly a third of atmospheric emissions, will go down.”

“That’s a concern because it means as we continue to emit carbon dioxide into the atmosphere those emissions will tend to be held more strongly in the atmosphere or in other sinks of carbon but the oceans will play a lesser role.”